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3905's blog

Educational Round Problem
By 3905, history, 8 years ago, In English

Hello my submission for the problem http://codeforces.com/problemset/problem/691/D gets MLE while I have seen similar solutions getting passed using lesser memory.Can someone explain what is the reason behind it. My submission http://codeforces.com/contest/691/submission/19745411 & other similar solutions are http://codeforces.com/contest/691/submission/19081882 & http://codeforces.com/contest/691/submission/19274092 & http://codeforces.com/contest/691/submission/19107997. Thanks!

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8 years ago, # |
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Auto comment: topic has been updated by 3905 (previous revision, new revision, compare).

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8 years ago, # |
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All other submissions use some kind of structure — arrayList or queue and you use recurrence, which may cause stack overflow and that's probably what happens, if you change your code to use structures it should be okay.

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    8 years ago, # ^ |
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    I am also using ArrayList structure.I don't understand what you mean by recurrence.Is that it in dfs?Every submission in dfs have used recurrence structure.

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      8 years ago, # ^ |
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      Two of those submissions use bfs not dfs so they have no problem with recurrence stack, I resubmitted the one with dfs and it barely passes the test your code is failing on, I personally would still rewrite that method, because recurrence DFS may cause problems like that, even if it's not the case here. The other thing I see you're initializing vertex and values lists n times, that may also cause some memory problems.

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